Why Is SDL_image not working - c++

Question

I am new to C++ and SDL; I am trying to add a new SDL extension libary using instructions found here: http://www.lazyfoo.net/SDL_tutorials/lesson03/windows/devcpp/index.php
But I get these errors:
3 C:\Documents and Settings\Edmund\My Documents\C++\myprojects\SDL\SDLevent.cpp SDL/SDL_image.h: No such file or directory.
C:\Documents and Settings\Edmund\My Documents\C++\myprojects\SDL\SDLevent.cpp In function `SDL_Surface* load_image(std::string)':
28 C:\Documents and Settings\Edmund\My Documents\C++\myprojects\SDL\SDLevent.cpp `IMG_Load' undeclared (first use this function)
and then a bunch of unqualified ids.
This is my code:
#include "SDL/SDL.h"
#include "SDL/SDL_image.h"
#include <string>
//Screen attributes
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;
const int SCREEN_BPP = 32;
//The surfaces
SDL_Surface *image = NULL;
SDL_Surface *screen = NULL;
//The event structure that will be used
SDL_Event event;
SDL_Surface *load_image( std::string filename )
{
//The image that's loaded
SDL_Surface* loadedImage = NULL;
//The optimized image that will be used
SDL_Surface* optimizedImage = NULL;
//Load the image
loadedImage = IMG_Load( filename.c_str() );
//If the image loaded
if( loadedImage != NULL )
{
//Create an optimized image
optimizedImage = SDL_DisplayFormat( loadedImage );
//Free the old image
SDL_FreeSurface( loadedImage );
}
//Return the optimized image
return optimizedImage;
}
void apply_surface( int x, int y, SDL_Surface* source, SDL_Surface* destination )
{
//Temporary rectangle to hold the offsets
SDL_Rect offset;
//Get the offsets
offset.x = x;
offset.y = y;
//Blit the surface
SDL_BlitSurface( source, NULL, destination, &offset );
}
bool init()
{
//Initialize all SDL subsystems
if( SDL_Init( SDL_INIT_EVERYTHING ) == -1 )
{
return false;
}
//Set up the screen
screen = SDL_SetVideoMode( SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP, SDL_SWSURFACE );
//If there was an error in setting up the screen
if( screen == NULL )
{
return false;
}
//Set the window caption
SDL_WM_SetCaption( "Event test", NULL );
//If everything initialized fine
return true;
}
bool load_files()
{
//Load the image
image = load_image( "astyle.bmp" );
//If there was an error in loading the image
if( image == NULL )
{
return false;
}
//If everything loaded fine
return true;
}
void clean_up()
{
//Free the image
SDL_FreeSurface( image );
//Quit SDL
SDL_Quit();
}
//Initialize
if( init() == false )
{
return 1;
}
//Load the files
if( load_files() == false )
{
return 1;
}
//Apply the surface to the screen
apply_surface( 0, 0, image, screen );
//Update the screen
if( SDL_Flip( screen ) == -1 )
{
return 1;
}
//While the user hasn't quit
while( quit == false )
{
//While there's an event to handle
while( SDL_PollEvent( &event ) )
{
//If the user has Xed out the window
if( event.type == SDL_QUIT )
{
//Quit the program
quit = true;
}
}
}
//Free the surface and quit SDL
clean_up();
return 0;
}
It is pretty much identical to what is on the tutorial so it should not be a problem with the code. I have followed the Instructions on Lazy foo to the letter, I have put all of the files in the right place and linked to them so i do not know what I am doing wrong.

Answer 1

Your compiler can't find the SDL/SDL_image.h header, that leads to all those 'undeclared' errors.
Maybe you skipped Step 2 in the linked instructions.

Answer 2

Are you sure you have the SDL_Image function at all? What IDE are you using?
If its visual studio make sure you have linked the following:
Also make sure you have downloaded the latest SDL_Image files from http://www.libsdl.org/projects/SDL_image/
Another possible issue is that you havent placed the SDL_Image DLL files in the correct place.

Answer 3

you should use
#include "SDL.h"
#include "SDL_image.h"
and make sure that you have put the sdl include folder in your include directory